public class TwoDimensionalArray05 {
    public static void main(String[] args) {
        /*
            int arr[][]={{4，6}，{1，4，5，7}，{-2}}；遍历该二维数组，并得到和

            思路
            1.遍历二维数组，并把各个值累计到sum
         */
        int[][] arr = {{4, 6}, {1, 4, 5, 7}, {-2}};
        int sum = 0;
        for (int i = 0; i < arr.length; i++) {
            for (int j = 0; j < arr[i].length; j++) {
                sum += arr[i][j];
            }
        }
        System.out.println("sum=" + sum);
    }
}
